Will my personal data be passed on to third parties?

PayPal

PayPal is committed to protecting the privacy of our users. When you send or request money using PayPal, recipients never see your bank account numbers or credit card numbers. They only see your email address, date of sign-up, and whether or not you have completed PayPal's Verification process.

Once your information reaches the PayPal site, it resides on a server that is heavily guarded both physically and electronically. PayPal servers sit behind an electronic firewall and are not directly connected to the internet, so your private information is available only to authorized computers.

Braintree

Braintree is a validated Level 1 PCI DSS Compliant Service Provider. We never store raw magnetic stripe, card validation code (CAV2, CID, CVC2, CVV2), or PIN block data. Storage of this data is prohibited by the PCI DSS. All communication between merchants and us is conducted in a secure fashion using TLS (Transport Layer Security).